package com.neusoft.resturant.common.interceptor;

import com.alibaba.fastjson2.JSON;
import com.neusoft.resturant.common.exception.BizException;
import com.neusoft.resturant.entity.SysUser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class AuthInterceptor implements HandlerInterceptor {
    @Autowired
    private RedisTemplate redisTemplate;

    // 前置拦截
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("拦截器进行拦截");
        //从redis取当前用户，取到的话说明该请求是已登录用户的请求
        String token = request.getHeader("token");
        System.out.println("token:" + token);
        if (token == null) {
            throw new BizException(401, "认证失败，非法用户");
        }
        String userJson = (String) redisTemplate.opsForValue().get(token);
        System.out.println(userJson);
        if (userJson == null) {
            throw new BizException(401, "认证失败，非法用户");
        }
        System.out.println("通过");
        SysUser curUser = JSON.parseObject(userJson,SysUser.class);
        request.setAttribute("userId", curUser.getUserId());
        return true;
    }
}
